The significance of a geochemically isolated intracrystalline organic fraction within biominerals

Gerald A. Sykes; Matthew J. Collins; Derek I. Walton

doi:10.1016/0146-6380(95)00086-0

The significance of a geochemically isolated intracrystalline organic fraction within biominerals

Gerald A. Sykes, Matthew J. Collins^*, Derek I. Walton

^*Corresponding author af dette arbejde

113 Citationer (Scopus)

Abstract

In studies of organic matter in fossil biominerals, there has been a widespread failure to distinguish between the organic matrix and organic matter trapped within the crystal elements. The existence of chemically isolated (intracrystalline) proteins are indicated by the persistence of amino acids after prolonged treatment with a strong chemical oxidant (NaOCl). The geochemical significance of these residual amino acids is illustrated by the re-analysis of aberrantly young d-aile/l-ile ratios (0.142 ± 0.042, n = 4) of amino acids from a land snail (Cepaea sp.) collected from Tattershall Thorpe in Lincolnshire. Following NaOCl treatment the d-aile/l-ile ratio increased (0.178 ± 0.014, n = 5), while both the total amino acid concentration and the variance declined.

Originalsprog	Engelsk
Tidsskrift	Organic Geochemistry
Vol/bind	23
Udgave nummer	11-12
Sider (fra-til)	1059-1065
Antal sider	7
ISSN	0146-6380
DOI	https://doi.org/10.1016/0146-6380(95)00086-0
Status	Udgivet - 1 jan. 1995

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title = "The significance of a geochemically isolated intracrystalline organic fraction within biominerals",

abstract = "In studies of organic matter in fossil biominerals, there has been a widespread failure to distinguish between the organic matrix and organic matter trapped within the crystal elements. The existence of chemically isolated (intracrystalline) proteins are indicated by the persistence of amino acids after prolonged treatment with a strong chemical oxidant (NaOCl). The geochemical significance of these residual amino acids is illustrated by the re-analysis of aberrantly young d-aile/l-ile ratios (0.142 ± 0.042, n = 4) of amino acids from a land snail (Cepaea sp.) collected from Tattershall Thorpe in Lincolnshire. Following NaOCl treatment the d-aile/l-ile ratio increased (0.178 ± 0.014, n = 5), while both the total amino acid concentration and the variance declined.",

keywords = "Amino acids, bivalve molluscs, chemical oxidation, protein degradation, racemization",

author = "Sykes, {Gerald A.} and Collins, {Matthew J.} and Walton, {Derek I.}",

year = "1995",

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journal = "Organic Geochemistry",

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TY - JOUR

T1 - The significance of a geochemically isolated intracrystalline organic fraction within biominerals

AU - Sykes, Gerald A.

AU - Collins, Matthew J.

AU - Walton, Derek I.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - In studies of organic matter in fossil biominerals, there has been a widespread failure to distinguish between the organic matrix and organic matter trapped within the crystal elements. The existence of chemically isolated (intracrystalline) proteins are indicated by the persistence of amino acids after prolonged treatment with a strong chemical oxidant (NaOCl). The geochemical significance of these residual amino acids is illustrated by the re-analysis of aberrantly young d-aile/l-ile ratios (0.142 ± 0.042, n = 4) of amino acids from a land snail (Cepaea sp.) collected from Tattershall Thorpe in Lincolnshire. Following NaOCl treatment the d-aile/l-ile ratio increased (0.178 ± 0.014, n = 5), while both the total amino acid concentration and the variance declined.

AB - In studies of organic matter in fossil biominerals, there has been a widespread failure to distinguish between the organic matrix and organic matter trapped within the crystal elements. The existence of chemically isolated (intracrystalline) proteins are indicated by the persistence of amino acids after prolonged treatment with a strong chemical oxidant (NaOCl). The geochemical significance of these residual amino acids is illustrated by the re-analysis of aberrantly young d-aile/l-ile ratios (0.142 ± 0.042, n = 4) of amino acids from a land snail (Cepaea sp.) collected from Tattershall Thorpe in Lincolnshire. Following NaOCl treatment the d-aile/l-ile ratio increased (0.178 ± 0.014, n = 5), while both the total amino acid concentration and the variance declined.

KW - Amino acids

KW - bivalve molluscs

KW - chemical oxidation

KW - protein degradation

KW - racemization

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U2 - 10.1016/0146-6380(95)00086-0

DO - 10.1016/0146-6380(95)00086-0

M3 - Journal article

AN - SCOPUS:0029415404

SN - 0146-6380

VL - 23

SP - 1059

EP - 1065

JO - Organic Geochemistry

JF - Organic Geochemistry

IS - 11-12

ER -

The significance of a geochemically isolated intracrystalline organic fraction within biominerals

Abstract

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